title: Retroperitoneal ectopic pregnancy after intrauterine insemination.
abstract: OBJECTIVE
  To report the exceptional condition of retroperitoneal ectopic pregnancy after intrauterine insemination.
  
  
  METHODS
  Case report.
  
  
  METHODS
  University hospital.
  
  
  METHODS
  A 37-year-old woman, gravida 2, para 1, presented to the emergency department 1 month after intrauterine insemination complaining of lower abdominal pain.
  
  
  METHODS
  A transvaginal ultrasound assessment revealed a complex mass containing a gestational sac with vitelline vesicle behind the left ovary. At laparoscopy, a nodular lesion was seen next to the left uterosacral ligament, suggesting the presence of an ectopic pregnancy in the retroperitoneal space.
  
  
  METHODS
  The unusual location of an ectopic pregnancy such as in the retroperitoneum should be examined in patients with clinical findings that suggest ectopic pregnancy if both the uterus and adnexa are normal during laparoscopic exploration.
  
  
  RESULTS
  The patient's retroperitoneal pregnancy was treated with a wide laparoscopic excision. To allow the removal of all trophoblastic tissue, a 3×2×2 cm hemorrhagic mass containing the ectopic pregnancy was removed from the retroperitoneal space. Retroperitoneal ectopic pregnancy was confirmed by the pathology diagnosis.
  
  
  CONCLUSIONS
  Retroperitoneal pregnancy after assisted reproductive techniques is an exceptional condition that must be considered in patients with clinical findings that suggest ectopic pregnancy if both the uterus and adnexa are normal during laparoscopic exploration.
authors.affiliation: Department of Obstetrics and Gynecology, La Fe University Hospital, Valencia, Spain. martinez.alicia.v@gmail.com
authors.forename: Alicia
authors.initials: A
authors.lastname: Martínez-Varea
authors.forename: Juan José
authors.initials: JJ
authors.lastname: Hidalgo-Mora
authors.forename: Vicente
authors.initials: V
authors.lastname: Payá
authors.forename: Inmaculada
authors.initials: I
authors.lastname: Morcillo
authors.forename: Elena
authors.initials: E
authors.lastname: Martín
authors.forename: Antonio
authors.initials: A
authors.lastname: Pellicer
mesh_terms: D015746:Abdominal Pain / Q000209:etiology; D000020:Abortifacient Agents, Nonsteroidal / Q000627:therapeutic use; D000328:Adult; D005260:Female; D006801:Humans; D007247:Infertility, Female / Q000209:etiology / Q000628:therapy*; D007315:Insemination, Artificial / Q000009:adverse effects*; D010535:Laparoscopy; D008727:Methotrexate / Q000627:therapeutic use; D011247:Pregnancy; D011271:Pregnancy, Ectopic / Q000175:diagnosis / Q000209:etiology* / Q000601:surgery; D012187:Retroperitoneal Space; D016896:Treatment Outcome
chemical_list: D000020:Abortifacient Agents, Nonsteroidal; D008727:Methotrexate